Fluid-ejector.



M. LEBLANG.

FLUID EJEGTOR.

APPLICATION FILED MAR. 31, 1910.

1,001,153, Patented Aug.22, 1911.

W/T/VESSES W J 3 To all whom it may concern:

in fluid ejectors and specially in appaceiver into another wherein the pressure is l composed of three parts. In the first, conarrangement will be described with refertus on line 4-4: of Fig. 2 which is a longi- "zles a a, a are arranged so that their de- MA'URICE LEBLANC, 0F PARIS, FRANCE,

ASSIGNOR T0 SOCIETE ANONYME POUR IJEXPLQITATION DESPROCEDES WESTINGHOUSE-LEBLANQ OF PARIS, FRANCE.

FLUID-macros.

Be it known that I, MAURIGE LEBLANG, a citizen of the Republic of France, residing in Paris, France, have invented certain'new and useful Improvements in Fluid-Ejectors, of Whichthe following is a specification This invention'relates to an improvement ratus of which the purpose is, to entrain a fluid by steam or gas proj ected at high speed so as to cause thefiuid to pass'from one rehigher than in the first receiver The motive fluid employed by me in the said ejector may be steam or other elastic fluid, gas or vapor. Apparatus of this kind may be regarded as sisting of one or ,several nozzles, a highspeed is communicated to the motive elastic fluid, steam or gas. In the second, which be called the mixer, the motive fluid eninto the work of compression. 7 4

The jet pum according to this invention is characterize by the particular arrange ment of its nozzles and its mixer and this once to the accompanying drawings.

Figure 1 is a cross section of the apparatudinal section of the apparatus.

Since the entrainingof one fluid by the other can only be due to friction, the motive elastic fluid is'projected through a considerable number ofnozzles a} a a, of which the delivery orifices b are situated at the en trance .of the diffuser A as shown iii-Fig. 1. This arrangement admits of developing as muchas may be desired the surface of the motive stream, the friction with which is to serve the purpose in question. These nozlivery orifices are uniformly distributed over the cross section of the entrance to the diffuser A (Fig. 1), in order that the fluid stream entering the difiuser may be as homogeneous as possible. But if the orifices of these motive nozzles were all on one plane the stream issuing from the nozzles of the outside zone would expand during the ontraining of the other fluid in proportion as the speed of the motive fiuidis reduced by the friction; they would thus form a screen Specification of Letters Patent. Patented Aug. 22, 19111. Application med March 31, v

1910. Serial No. 552,581.

which would prevent the surrounding fiuid from penetrating into the central portion of the mixer. Experience has shown that in such an arrangement all of the motive streams behaves as a single stream the surface of which is channeled; The central streams have practically no entraining effeet. In order to avoid this objection the nozzles are arranged in concentric zones in successive planes as represented in Fig. 2.

In this figure it is supposed by way of exam le that there are 27 nozzles uniformlydistri uted on the circumferences of three concentric circles, namely, a circle of three nozzles a a circle of 9 nozzles a and a cirnozzles are situated in the planes 1-1, 22, 33 at different distances from the entrance to the difiuser, the plane 1 -1, which containsthe orifices of the central nozzles a, is the Farthest from the entranceto the diffuser. The plane 22, containing the orifices of the nozzles of the intermediate zone a is at an intermediate distance; while the plane 3-3, containing the orifices of the outside zone of nozzles a is the nearest to the entrance of the diffuser proper A which entrance may be situated in the plane it-A.

The fluid which is to be entrained by the motive streams issuing from the three central nozzles a comes in contact with said streams-by passing-through the spaces bedo of 15 nozzles a The apertures of such tween the other nozzles a of, or the tubes planes 1 1 and p streams on arriving at the plane 2 have entrained that mass of fluid which they are capable of entraining; and their operation is not-impaired by the fact that the streams issuing from the intermediate zone of no zles forms a screen around the first-named streams. I Thelfluid to be entrained by the streams issuing from the'nozzles a? of the intermediate zone comes in contact with these streams after having passed tlirough only the spaces of invariable section between the of the intermediate zone arrives at plane 3-3 it has also entrained all the mass of fiuid which it is capable of entraining and will not be affected by the fact that the surrounding fiuid at the plane 33 is prevented from flowing toward these streams. Finally the fluid to be entrained by the streams issuing from the nozzles of the outside zone comes into contactwith these streams by flowing along paths, such as those represented by the arrows 7. Owing, therefore, to this particular arrangement of the mixer the fluid to be entrained comes into contact with the streams of the central zone as easily as with those of the outside zone. In this manner not only is the available surface for friction thoroughly used, but there is forwarded into the diffuser the resultant stream which is homogeneous and has very approximately the same speed at all points. This is an essential of good output of the diffuser.

In Figs. 1 and 2 there are twenty seven nozzles distributed in three concentric zones. It will be understood that this number has been selected merely as an example and that the number of nozzles and of zones may be varied as desired. I

In Fig. 2 it has been assumed that the pressure of the motive fluid requires nozzles of the convcrgiiig-diverging type. The same arrangementapplies to a case where the pressure of the motive fluid only requires the use of siin le conver in nozzles. b 5

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A apparatus provided with nui ierous separated motive fluid tubes arranged in a plurality of concentric stepped groups, and wherein the discharge orifices of the tubes nearest the axis of the apparatus are farthest from the entrance of the diffuser, and so disposed that as the distance between such discharge orifices and the axis of the apparatus increases, the distance betweensuch discharge orifices and the entrance to the diffuser increases, whereby the fluid comes as easily into contact with the ets of the central group as with the jets of the ex terior group and all the fr ction surface available is utilized, and there is projected into the diffuser a homogeneous stream having practically the same velocity at all points.

2. A jet apparatus having numerous motive fluid tubes,;the orifices of which are of various distances from the entrance to the diffuser, the orifice of the innermost tubes being farthest therefrom, and the distances between the orifices of the remaining tubes and said diffuser entrance diminishing toward the outermost tubes which have their orifices nearest said diffuser entrance.

In witness whereof I have hereunto Mansion LEBLANG.

Witnesses D. KUBLANY, H. 0. Com. 

